Liquid-measure indicator



(No Model.)

` T. HMWELL.l

LIQUID MEASURE INDCATOR. No. 439,508. Patented Ont "Alli/it;iililiiililil, @F ALLEGHENY,

ASSIGNOR- TQ. THE PITTSBURG BRASS COMPANY, F PITTSBURG, PENNSYLVANIA.

Litttllillnirliuii iNDlCTUFi.

forming part of Letters Patent No. 439,508, dated October 28, 1890.

Application filed February 3, 1890. Serial No 3391109. (No model.)

einem, t may concer/L.-

t known that i, Tnonns HIPWELL, of ny, in the county of Allegheny andPennsylvania, have invented a new l nl improvement in Liquidliieasure Hre; and l do .hereby declare the iol- 1n be a full, clear, and exactdescripinn relates to liquid-xiieasnre inhat in, to a form ot gage bywhich y of any liquid contained in a vesaseertained by the movement ofr-ting0r over the face ot a gradu- .rention has for its object toprovide atei' which is suited not only for regig the quantity nt liquidcontained in `.finite eind eaehs, but also one which g constructed ofsuoli dimensions as to Jpeeiially Well adapted to be used inconthe ionntof a lamp. The prevailing form nii la-rnpe as now manufactured arechiefly termed of brass, and in order to give a ver fnndbriliiantiiametheburners are often nnnntrncted piojgiortionatelylarge. Such a .l ynie consumes a great quantity of oil and neeoneitatesthe emphiyment of. a very large tonni; or bowl, some being capable ofholding `lion oi oil. lire tennis being formed oi s or other opaquematerial do notI permit ertaining from the exterior oi the fonnt on muonoil it eontains, `while "to li't i'ennt irom the hanger ind ehehe it tohon' inueh i! contains is n. 'veryindexlnite .and inconvenient mode oiascertaining the invention comptines, geiierallyesltated, a tnlnilarcase extending down, therei nnd having a slot therein', a guiderodnrnaled in the cane and connected to the ating-.finger oi the dial,anda'loat enng the case and having a guide-finger i tering the slot andengaging with the guided, large fioat being thus employed which gnidedin its movementby the ease which it eneirclee and which onlyengagesrwith the guide-rod by a linger enteringr the slot, friction.between the parts being avoided.

enable others skilled in 'the art to make mon with einali vessels, such,iorinstance','

and use my invention, I will describe the same more fully, referring tothe accompanying drawings, in Whichl Figure l isasectional viewofmyimproved indicator situated within the tount of alamp, partly brokenaway, the spiral gnide-rod being shown in full lines. Fig. 2 is avertical cent-ral Section of the indicator. Fig. is a l cross-section onthe line 3, Fig. 2. Fig. l

.is a plan view, and Fig. 5 is a modified forni 6o ot my invention.

Lilie letters of reference indieatelike parts in each view.

I have illustrated my invention, and will describe the same inconnection with its applieation to the fount of a lamp; but it isnpparent that it may be applied with advantage to many kinds of vessels.

The dial a is made of a size correspond V,ing to the capacity of thelamp-fount to 7o which it is to be applied, and has uponit-s upper facea graduated scale so marked as to indieate the quantity of oil the fountis capable of holding, and also has points thereon which, inconnection-With the indicating-tim ger, as will more fully appear,indicate when the fount is full or empty. 'ihe bodyof the dial e hasthethreaded portion a adapted to engage with the threaded scat b'in the topot the fount or bowl I). Secured to the dial CL is 8o thotubular shaftC, which passes up through an opening n? in the center of the body ofsaid dial. This tubular shaft c is provided 'with thelongitudinally-extendng slot e', extending from a point just above thebase of said shnit to the bottom lace of the dial d. 'l`hc shaftcis madeof such a length that when the dial a. has been scoured in the seat b ofthe fount Z; its lowest extremity will reach almost to the bottom of thefount. Incased 9o within the tubular shaft c is thespiral guide* rod (l,said spiral rod being journaled at its lower end in the base o2 of thetubular shaft c and the upper end being journaled in the opening da inthe center of the dial ci. To this end of the spiral guide-rod d issecured the indioating-iinger e. The spiral guide-rod d is twisted inproportion to the space which it is desired to have theindicating-linger is only marked to register half of its cirspiral roddwill travel over t-he surface of the cumterence, it is only necessaryfor the guidedial, registering at each mark thereon, until rod to betwisted half a turn and a proit reaches the pointinarked Full. It isthen 55 portional increased twist being imparted to known that theutmost capacity of the fount the rod according to movement of thetiiigerhas beenvreach'ed and thus there is no danger Whether itmovesrover three-fourths of or of filling the fountbeyond its capacityand alover the entire face ot the dial. Assuming lowing the oil toAoverflow, not only thereby that the fount shown in the drawings has awasting the oil, but rendering the exterior of 6o capacity of a gallonor eight pints, then the the fount oily and disagreeable to handle. iomost convenient method is to have the face When the lamp has beenlighted and the oil ot the dial accordingly marked o with begins to beconsumed,the float will drop ac- `eight spacesbetween the points,indicating cordingly, imparting a steady and gradual Whenthefountis fulloreinpty, and these rotary movement to the spiral rod d and a 65 spacesare numbered accordingly. similar movement to the indicating-finger e,i5 Below the dial a a oat f, formed of cork and when it reachesthe'point marked 7 it or other suitable material, encircles thetubuindicates that there vstill remain within the lar shaft c, bein garrangedto move readily up fount seven pints of oil. As the oildiminishes and down thereon, said shaft passing through within thefou'nt, so the finger @keeps rotating, 7o the central seat f', formed insaid. oat `f. registering the gradual deci-casein the amount 2o Withinthe seat f' of the float f is secured thereof until the iloathas reachedits lextreme the guide-pin g, which en gages with the faces positionY onthe shaft c, when the finger e will o the spirai guide-rod d. in such aWay that again indicate'that the fount is empty, The when the iight f israised or lowered upon the scale can of course be arranged to register75 I tubular shaft c the guide-pin g, traveling any desiredfractionsnofl the contents of the along the faces of the spiral rod d,acts to rovessel, and the register may be employed with Vtate said rod.The oat f is held upon the any suitable vessel. shaft c by theVguide-pin g, which comes in What I claimv as my invention,.and desirecontact with the lower extremity of the slot c. to Secure by. LettersPatent, is- 8o v l/nFig. 5 is shown a modified form of my l. Inaliquid-measure indicatorfthe coniinvention in which the rod carrying theinbination of a dial, a tubular case extending (heating-finger isstraight instead of spirally down therefrom and having a slot therein,an twisted, but isiat or angular in cross-section. angular rod journaledin the case and carry- The slot cu the tubular case is made spira-l,Aing the"indicatingtinger, and a float encir- 85 1 and the guide-pin gofthe oat passes through cling the case and having a guide pin or fin` thespiral guideway sb formed and engages ger passing through the slotandengaging' with the rod, and as .the float is raised or low? with the rodwithin the case, substantiallyas i ered it is rotated by the spiral slotand so and for the purposes set forth. turns the rod and itsindicating-finger. 2. In a liquid-measure indicator, the com- 9o Toillustrate the operationof my improved bination of a dial, a tubularcase extending Y 4o indicator in its application to the fount of a downtherefrom and having a slot therein, a

lamp, let it-be assumed that the fount contains hspiral guide-rodjournaed in said case and no oil, when the oat f will be at its lowestcarrying an indicating-finger, and a float enposition on the tubularshaft c. The indicatcircling the case and having a guide pin or 95ing-nger will, then register at the point on finger engaging with thespiral guide-rod,sub-

- thc dial a marked Empty Oil is the-n stantially as and for thepurposes set forth.

pcuredinto the fount b, and as it rises therein In testimony whereo '1,the said THOMAS the oat f is also carried -up on the surface of HIPWELL,have hereunto set my hand. the same, and the guide-pin secured withinTHOMAS HPWELL said float and engaging with the spiral rod d 5o acts toturn the said rod d and through it Witnessesi moves Vtheindicating-finger e. ln this way J. N. COOKE,

as the oil is introduced into the fcunt b the RoB'r. D. ToT'rEN.

